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Individual Calculations February 2015 |
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| Cohen, Lawrence S Total change: 17.00 | |   |
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| 2015 Portsmouth Open | Portsmouth, New Hampshire | USA | 2015-01-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2035 | 1920 | 2.00 | 3 | 0.85 | 20 | 17.00 | |
|  Elmore, John P | | | 1950 | USA | 1.00 | 1 | 0.54 | 20 | 10.80 | |  Yip, Carissa S | | | 1851 | USA | 1.00 | 1 | 0.40 | 20 | 8.00 | | | Kelleher, William | f | | 2305 | USA | 0.00 | 1 | -0.09 | 20 | -1.80 | |
Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change) | | |
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